Stocks / AON vs ONB

AON vs ONB: Which Stock Is the Better Buy?

Aon plc and Old National Bancorp side by side — fundamentals from SEC filings, refreshed nightly. Sector: Financial Services.

AON is the larger company ($76.5B vs $9.4B). On the fundamentals, ONB grows revenue faster (84.8% vs 9.2%); ONB earns a higher net margin (25.6% vs 21.5%); AON has the stronger return on equity (39.5% vs 7.7%). On the filings, AON carries fewer potential red flags (0 vs 1). Full numbers below — the stronger figure on each row is in green.

AI verdict — AON vs ONB, read from the filings

The stronger business, the cheaper stock, and the risks — synthesised from both companies’ SEC filings, every figure computed not guessed. Not investment advice.

 Aon plc (AON)Old National Bancorp (ONB)
Market cap$76.5B$9.4B
Revenue (latest FY)$17.18B$2.55B
Net income (latest FY)$3.69B$653.12M
Revenue growth (5y CAGR)9.2%84.8%
Net margin21.5%25.6%
Return on equity39.5%7.7%
P/E ratio19.912.6
Dividend yield0.9%2.4%
Profitable years (of last 10)1010
Positive free cash flowYesYes

Verify the comparison

Use the filing period and source shown by each tool before treating two figures as comparable.

Compare with another company:

See the full AON vs ONB breakdown

Both companies across 19 years of income statement, balance sheet and cash flow — with ratios, health checks and Ask, the SEC-grounded research assistant. Free, no account needed.

Open AON's full financials →   Open ONB's full financials →

More comparisons

Frequently asked questions

Which is bigger, AON or ONB?

Aon plc is larger by market capitalization — $76.5B versus $9.4B.

Which grows faster, AON or ONB?

Over the last five fiscal years, Old National Bancorp grew revenue faster — 84.8%/yr versus 9.2%/yr, computed from SEC-filed statements.

Where does this data come from?

All figures are computed from official SEC filings (10-K), refreshed nightly. This is a data comparison, not investment advice.

Keep exploring

AON fundamentals → · ONB fundamentals → · All 1,500+ companies → · Free screener →